Help, Support and Suggestions

I think that something is wrong with the Comic Title/Banner system. Every time I try to send for or upload another banner for my comic as a new title, the previously used one doesn't get replaced but stays. I tried to upload a new one about 10 times already and the banner stays the same. I tried deleting the old file bile but no matter what, when I press send the banner comes back the same, and the new one doesn't go up. Help anyone?!